diff options
Diffstat (limited to 'lib/libspl')
| -rw-r--r-- | lib/libspl/include/synch.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/lib/libspl/include/synch.h b/lib/libspl/include/synch.h index 7ce2a53d4..93d231498 100644 --- a/lib/libspl/include/synch.h +++ b/lib/libspl/include/synch.h @@ -21,10 +21,61 @@ */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. + * Copyright 2014 Zettabyte Software, LLC. All rights reserved. * Use is subject to license terms. */ #ifndef _LIBSPL_SYNCH_H #define _LIBSPL_SYNCH_H +#ifndef __sun__ + +#include <assert.h> +#include <pthread.h> + +/* + * Definitions of synchronization types. + */ +#define USYNC_THREAD 0x00 /* private to a process */ +#define USYNC_PROCESS 0x01 /* shared by processes */ + +typedef pthread_rwlock_t rwlock_t; + +#define DEFAULTRWLOCK PTHREAD_RWLOCK_INITIALIZER + +static inline int +rwlock_init(rwlock_t *rwlp, int type, void *arg) +{ + pthread_rwlockattr_t attr; + int err = 0; + + VERIFY0(pthread_rwlockattr_init(&attr)); + switch (type) { + case USYNC_THREAD: + VERIFY0(pthread_rwlockattr_setpshared(&attr, + PTHREAD_PROCESS_PRIVATE)); + break; + case USYNC_PROCESS: + VERIFY0(pthread_rwlockattr_setpshared(&attr, + PTHREAD_PROCESS_SHARED)); + break; + default: + VERIFY0(1); + } + + err = pthread_rwlock_init(rwlp, &attr); + VERIFY0(pthread_rwlockattr_destroy(&attr)); + + return (err); +} + +#define rwlock_destroy(x) pthread_rwlock_destroy((x)) +#define rw_rdlock(x) pthread_rwlock_rdlock((x)) +#define rw_wrlock(x) pthread_rwlock_wrlock((x)) +#define rw_unlock(x) pthread_rwlock_unlock((x)) +#define rw_tryrdlock(x) pthread_rwlock_tryrdlock((x)) +#define rw_trywrlock(x) pthread_rwlock_trywrlock((x)) + +#endif /* __sun__ */ + #endif |